Ich benutzePhantomknoten Knoten mit PhantomJS zu verbinden. Ich versuche, Seiten parallel zu öffnen, aber das Problem ist daspage.open Die Rückruffunktion gibt den Verweis auf die Seite nicht zurück, sodass ich nicht wissen kann, welche Seite fertiggestellt wurde.

Relevanter Code

self.queue[j].page.open.call( self.queue[j].page, rows[i].url, function( status )
{
   console.log( this ) // <-- returns undefined
   // So how do I keep track of which pages have finished loading?
   // The only variable I have available here is `status`
});

Voller Funktionscode:

SnapEngine.prototype.processSnaps = function( rows, type )
{
var self = this;

if ( ! rows || rows.length === 0 ) return true;

for( var i = 0; i < rows.length; i++ )
{
    // If queue is full, stop processing and wait for next snap engine iteration
    if ( self.getAvailableSizeInQueue() <= 0 )
    {
        self.logger.info( 'Queue is full for signature snap processing' );
        return true;
    }

    // Snapshots are processed by url, if multiple duplication urls are requested, all are updated after one of them is complete
    // So if a url is already being processed, don't reprocess it
    if ( self.findUrlInQueue( rows[i].url ) !== false )
    {
        self.logger.info( 'URL already being processed', url );
        continue;
    }

    for( j = 0; j < self.queue.length; j++ )
    {
        // Find an unused page object
        if ( self.queue[j] && self.queue[j].hasOwnProperty( 'page' ) && ( ! self.queue[j].page.url || self.queue[j].page.url == '' ))
        {
            self.logger.info( 'Opening URL in browser', rows[i].url );

            // Start loading page
            self.queue[j].page.open.call( self.queue[j].page, rows[i].url, function( status )
            {
                // ===== ISSUE HERE =====
                var url = this.url; // <-- this is undefined
                // ======================

                self.resetPage( self.queue[ index ]);

                if ( status === 'success' )
                {
                    self.updateStatus( url, 'ready' );
                }
                else
                {
                    self.updateStatus( url, 'failed' );
                }

                self.removeUrlFromQueue( url )
            });

            self.updateStatus( rows[i].url, 'processing' );
            break;
        }
    }
}
}